Judith Kerr: Mog's Christmas comeback
Mog the cat has been loved by children and their parents since the first books in the 1970s.
But the series by author and illustrator Judith Kerr came to an end in 2002 when the famous cat died in Goodbye Mog.
Now Kerr has brought Mog back for a special Christmas book, with profits from Mog's Christmas Calamity going to Save the Children's literacy programme.
Kerr has also just published new illustrated book called Mister Cleghorn's Seal based on a true story.
Judith Kerr Spoke to BBC News about Mog, Mister Cleghorn's Seal and why she started writing children's books.
Video journalist: Sophie van Brugen
Mog's Christmas Calamity courtesy of Sainsbury's
23 Dec 2015